Trek has been doing 29ers quite awhile, so they know and a thing or two about making a great 29er hardtail. The X-Caliber 7 uses a sleek, light Gold Series aluminum frame features Gary Fisher's ride-enhancing G2 geometry for superior cornering, climbing and descending. Adding to those attributes is a set of steamrolling wheels and a 100mm-travel fork that smooths the trail and steers you through the roughest terrain. Component highlights include a Shimano 27-speed drivetrain, and disc brakes that give you awesome stopping power in any and all conditions. And with Trek's Smart Wheel sizing, you're riding the fastest wheels with the best possible fit.